John Brown
Freeloading Social media influenza
Ah! Thanks for the explanation!When the steam from the shower hits the cold air from an open window... it instantly turns the water vapor into water. It's why you end up with soaking walls if you leave the window open... a fast extractor fan pulls this moisture out and expels it outside.
In a normal setting without the steam/shower you would be correct. Heating and a trickle of circulating air air from outside will produce low humidity and dry walls... in a bathroom... not at all.